KR20010011247A - Controlling method and apparatus for wide bandwidth radar detector - Google Patents

Abstract

PURPOSE: A wide band radar detector and a method of controlling operation of the same are provided to reduce size and manufacturing cost while preventing erroneous operation caused by a noise. CONSTITUTION: A detector comprises the first local oscillation unit(113) formed integrally with a phone antenna(111); the first amplifying unit(120) for amplifying signals received from the phone antenna, and the first local frequency from the first local oscillation unit mixed by the first mixer(112); the second local oscillation unit(140) having oscillators(141-143); the second amplifying unit(150) for amplifying the signal amplified by the first amplifying unit and the second local frequency from the second local oscillation unit mixed by the second mixer(130); a filter(160) for filtering the signal amplified by the second amplification unit; a demodulation unit(170) for demodulating the signal passed the filter; an AD converter(180) for converting the demodulated signal; a central processing unit(190) for calculating cycle and width of the digital signal, and generating pulses for controlling operation of the first and second local oscillation units; a pulse delay unit(210) for delaying or maintaining the pulse output from the central processing unit; a sweep voltage generating unit(220) for receiving voltage from the pulse delay unit and driving the first local oscillation unit; a laser module(260) formed integrally with the phone antenna so as to receive laser signal; a sound unit(230) for outputting sound signal to a speaker(233); a display unit(240) for displaying the output signal onto a display; and an additional function selection unit(250).

Description

Broadband radar detector and control method thereof {Controlling method and apparatus for wide bandwidth radar detector}

The present invention relates to a radar detector and a control method thereof, and more particularly, to detect all signals for inducing safe driving of a vehicle and radar signals for grasping the speed of a vehicle, and to apply circuits and algorithms for preventing malfunction. In this case, the oscillator cavity can be sweeped over a wide frequency range, using a local oscillator that oscillates at independent frequencies, using the scanning method, and integrating the laser receiver module with the horn antenna. By alerting the detection results visually (using numbers, letters, and graphics) and acoustically (using alarms and voices), the product can be miniaturized and widened, manufacturing costs can be reduced, and malfunctions caused by noise can be prevented. The priority of the signals can be set so that the user can clearly judge the situation to prevent accidents. Rock, and the next of the Intelligent Transport Systems: it is possible to detect the various control signals with respect to (ITS INTELLIGENT TRANSPORT SYSTEM), and further relates to a broadband radar detector as possible, and a control method utilized in a vehicle collision preventing system.

In developed countries, many efforts have been made to ensure the safe operation of vehicles by using different types of speed gauges using different MICROWAVE and LASERs and pre-safety transmitters that report various dangerous situations on the road.

In particular, the United States legally recognizes the use of such speed gauges and detectors, and annually consumes about 2 million new products, and there is a growing number of countries that are legalizing their use worldwide.

The following signals are used for the types of signals used in these measuring instruments and detectors, depending on the instrument used.

That is, to prevent the speed of the vehicle, the speed gun (SPEED GUN) for detecting the speed of the vehicle includes Ko-BAND (9.900 GHz), X-BAND (10.525 GHz), Ku-BAND (13.450 GHz), and K-BAND ( 24.150 GHz), SUPERWIDE Ka-BAND (variably distributed between 33.000-36.000 GHz), and LASER (having a wavelength of 800 nm-1100 nm). SAFETY ALERT SYSTEM uses the frequency of 24.070 to 24.230 GHz to transmit three informations of railroad crossings, under construction, and emergency vehicles using the frequency of 24.070 to 24 GHz, and the SAFETY WARNING SYSTEM is 24.075. 64 kinds of information such as fog area, construction site, school area and speed reduction are coded using the frequency of 24 to 125 GHz.

Such safety-related transmission and reception systems are currently being activated mainly in the United States, are spreading worldwide, and are expected to have a great relationship with future intelligent transportation systems (ITS).

All of these frequencies and applications are already defined by the Federal Communications Commission (FCC) of the United States.

Examples of a system capable of detecting various signals include a radar detector of Korean Patent Publication No. 91-5945 and a three-band radar detector of Publication No. 94-11015.

The radar detector is a device that receives microwaves emitted from a speed gun using microwaves and detects them and outputs the intensity of the received microwaves to an indicator. By determining whether it is a radio wave or an undesired wave emitted from an adjacent radar detector, it is possible to accurately distinguish the received electric field strength and the frequency band (X or K band) only when the radio wave is emitted from a speed gun.

In addition, the three-band radar detector automatically selects and adjusts the two intermediate band local oscillators according to the frequency bands detected from the three-band horn antennas, resulting from the delay of time generated during the radar detection and the interference of the intermediate band local oscillators. It is to prevent oscillation and malfunction.

However, such a conventional apparatus has the following problems.

First, the reception capability of the horn antenna, which is the input terminal of the signal, and the limitation of the local oscillator and the high frequency circuit, limit the reception capability. Therefore, the radar detector of Publication No. 91-5945 cannot receive any signal other than two band signals. The oscillation frequency of the local oscillator is fixed, the three-band radar detector of Announcement No. 94-11015 can receive only three band signals, and the oscillation range of the local oscillator is 80 MHz, which is the transmission frequency of the existing transmitter. Can't receive enough range.

In addition, there is a high possibility of malfunction due to changes in the radio wave environment, it is impossible to set the priority of the received signal, and it is difficult for the user to grasp the situation by displaying only the buzzer and the light emitting diode (LED). In addition, there was a problem that the transmission signal using the laser can not be detected.

The present invention is to solve the above-mentioned shortcomings, to reduce the size and wideband of the product, to reduce the production cost, to prevent malfunction due to noise, and to set the priority of the received signal, so that the user clearly The present invention aims to provide a broadband radar detector and its control method which can be used to prevent accidents.

The present invention applies a circuit and algorithm for preventing malfunction, applies a oscillator cavity capable of sweeping a wide frequency range, and scans using multiple local oscillators each oscillating at independent frequencies. It is achieved by using, and integrating the laser receiving module with the horn antenna, and alarming the detection result visually (using numbers, letters and graphics) and acoustically (using alarms and voices).

1 is a block diagram showing the configuration of a wideband radar detector of the present invention;

2 is a flow chart showing a control method of the broadband radar detector of the present invention;

Figure 3a is for the time control of the first local oscillator in the central processing unit of the present invention

Output waveform,

3B is a sweep waveform diagram for controlling the first local oscillator of the present invention;

Figure 3c is to control each of the second local oscillation unit in the central processing unit of the present invention

Output waveform diagram,

3d illustrates a signal received by the broadband radar detector of the present invention.

Waveform diagram showing white noise appearing,

FIG. 3E illustrates a waveform in which the waveform of FIG. 3D is converted and input to the CPU. FIG.

Waveform diagram.

<Explanation of symbols for main parts of drawing>

111: horn antenna 112: first mixing portion

113: first local oscillation unit 120: first amplification unit

130: second mixing unit 140: second local oscillation unit

150: second amplifier 160: filter

170: demodulation unit 180: AD conversion unit

190: central processing unit 210: pulse delay unit

220: sweep voltage generator 230: voice display means

240: time display means 250: additional function selection unit

260: laser module

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a wideband radar detector of the present invention. The present invention includes: a first local oscillation unit 113 integrally installed on one side of a horn antenna 111; A first amplifier 120 for amplifying after mixing all the signals received by the horn antenna 111 with the first local frequency generated by the first local oscillator 113 in the first mixer 112; A second local oscillator 140 comprising three oscillators 141, 142 and 143 each oscillating independent frequencies; A second amplifier 150 for amplifying the signal amplified by the first amplifier 120 and the second local frequency generated by the second local oscillator 140 after mixing in the second mixer 130; ; A filter unit 160 for selecting and passing the signal amplified by the second amplifier 150; A demodulation unit 170 for detecting a signal passing through the filter unit 160; An AD converter for converting the detected signal into a digital signal; Measuring and calculating the period and the width of the digital signal to analyze and output the band and information of the signal, and generating a pulse to determine the type and information of the signal with respect to time by the first local oscillator 113 and A central processing unit (190) for adjusting the driving of the second local oscillator (140); A pulse delay unit (210) for delaying or maintaining a pulse received from the central processing unit (190); A sweep voltage generator 220 generating a voltage from the pulse delay unit 210 to drive the first local oscillator 113; A laser module 260 integrated with the horn antenna 111 and receiving a laser signal; Voice display means 230 for finding a voice signal for the type of information using the output signal and outputting the voice signal to the speaker 233 through the voice amplifier 232; Visual display means (240) for visually expressing the output signal in letters, numbers, and graphics on an alphanumeric display; It is composed of an additional function selection unit 250 for selecting the display state of the voice display means 230 and the time display means 240.

That is, the first local oscillation unit 113 and the first mixing unit 112 of the present invention may be integrally installed in the insertion unit 110 of the horn antenna together with the horn antenna 111.

The first local oscillator 113 mainly comprises a GUNN diode, a VARACTOR diode, and an oscillation frequency adjusting bolt.

In addition, the first local oscillator 113 may configure an oscillator cavity to oscillate a wide band frequency range and oscillate a frequency of 11.800 to 12.300 GHz, and sweep more than 500 MHz It is characterized in that to enable this.

The second local oscillator 140 may separately oscillate frequencies of 300 MHz, 1380 MHz, and 2085 MHz, and alternately oscillate successively regardless of the presence or absence of a received signal, so that the second local oscillator 140 may receive signals of different bands. A signal can be received, and the priority of the received signal can be input to the central processing unit 190, so that the reception band of the first priority can be immediately converted and received while receiving other signals.

On the other hand, the laser module 260 is composed of a light receiving element 261, linear amplifiers 262, 263, a logic amplifier 264 and a monostable multivibrator 265, the laser signal having any wavelength within a given range Even if the central processing unit 190 is to be recognized.

In addition, the additional function selection unit 250 includes a muting function for deleting an audible display, a dimmer function for adjusting the contrast of a visual display, and a function for reducing reception sensitivity as needed. 190) to output the received signal in an optimal way according to the user's situation.

As the horn antenna for detecting a signal in the present invention, it is preferable to use the horn antenna of the radar detector of the inventor application No. 99-xxxxx (to be described in the actual application number) by the present applicant.

The horn antenna is miniaturized and formed on the septum and the opening surface so as to receive signals of 8-band frequency bands of Ko, X, VG2, Ku, K, SA, SWS, and SUPERWIDE Ka. Since the local oscillation unit, the laser module, and the first mixing unit can be integrally inserted, optimal performance can be realized together with the wideband radar detector of the present invention.

2 is a flowchart illustrating a control method of the wideband radar detector of the present invention, comprising: an initialization step S1 for initializing a memory and an input / output terminal; A high logic switching step (S2) of making the terminal controlling the first local oscillator high logic to detect whether a signal is received; An additional function operating step (S3) for operating the selected function of the additional function when selected; A reception check step (S4) of checking whether the radar receives the signal and checking the signal continuity; A signal checking step S5 for determining a band and strength of the signal; An alarm method determining step (S6) for determining an alarm and an indication of a signal; A second local oscillator operation step (S7) of sequentially oscillating three second local oscillators; A delay step S8 of delaying a predetermined time to prevent a malfunction and to stabilize the first local oscillator; A low logic switching step (S9) of converting the control terminal of the first local oscillator into low logic; A scan step (S10) of inspecting and outputting a signal; It consists of an output step (S11) for outputting the inspection result of the scanning step (S10) visually and audibly.

In addition, the scanning step (S10) is a signal determination step (S10-1) for determining the strength and frequency of the signal, a laser signal determination step (S10-2) for checking the reception of the laser signal, and the authenticity of the signals It is configured in detail with the authenticity determination step (S10-3) for checking.

Preferably, the delay time of the delay step S8 is 10 ms, and the authenticity determination step S10-3 includes the sweep time of the first local oscillator and the on-off time of the second local oscillator, and the pulse of the received signal. Characterized by comparing the period.

3A to 3E are diagrams showing waveforms according to the operation of the broadband radar detector of the present invention. FIG. 3A is an output waveform diagram for time control of the first local oscillator in the central processing unit of the present invention. Figure 3c is a sweep waveform diagram for controlling the first local oscillator of the invention, Figure 3c is an output waveform diagram for controlling the time of each of the second local oscillator in the central processing unit of the present invention, Figure 3d is a broadband radar detector of the present invention FIG. 3E is a waveform diagram showing waveforms of white noise appearing when a signal is received, and FIG. 3E is a waveform diagram illustrating waveforms converted from the waveform of FIG. 3D and input to the central processing unit. Referring to FIGS. And the effect is as follows.

When the signal is received from the horn antenna 111, the frequency received using the first local oscillation frequency oscillated by the first local oscillator 113 integrated with the horn antenna 111 is the first mixing unit 112. In the mixing is converted to the first intermediate frequency and amplified while passing through the first amplification unit 120 designed to have a wide coupling coefficient.

At this time, the first local oscillator 113 is a waveform having a 130 ms output from the central processing unit 190 (see Figure 3a) is input to the sweep voltage generator 220, the voltage is adjusted according to the sweep pulse for the period The frequency is oscillated by the voltage, and the signal received through the pulse delay unit 210 delays the voltage adjustment of the sweep pulse by Ta, Td, and Tc time according to Td and Te in FIG. This prevents malfunctions.

The converted and amplified first intermediate frequency is a frequency and stripline already calculated according to the band of the received signal among the oscillation frequencies of the three second local oscillators 140 designed to widen and lower the reception band. The second mixing unit 130 is configured to be mixed and converted into a second intermediate frequency.

Each of the second local oscillator 140 (141, 142, 143) oscillates the frequency of 300MHz, 1380MHz, 2085MHz for a period of a low pulse according to the pulse (see Fig. 3c) output from the central processing unit 190.

Herein, the conventional invention could not detect before the received signal disappears even if another signal is received due to fixing a specific oscillation frequency when the signal is received, but the present invention continues with three frequencies as described above. Since the oscillating oscillates alternately, signals of different bands can be received even while receiving signals, and the priority of the received signals can be input to the central processing unit 190 so that the first receiving band of the first order can be received immediately while receiving other signals. Can be converted and received.

The converted second intermediate frequency is amplified by the second amplifier 150 and then passes through the demodulator 170 after passing only the 9 MHz signal through the filter 160, as shown in FIG. 3D. Likewise, the pulse A is loaded on the white noise, and the pulse A is converted into the digital signal 307 through the AD converter 180 and applied to the central processing unit 190.

The applied signal is determined according to the period of the pulse (determined by the values of Ta, Tb, Tc, Td, and Te in FIG. 3E), and according to the control method of the present invention shown in FIG. Types (Ko, X, Ku, K, Ka, SA, SWS, VG2) and determine the malfunction according to the frame to visually display the processing results through letters, numbers, and graphics through the visual display means 240 Then, the recorded voice IC 231 is controlled to send a voice signal to the voice amplifier 232 to perform audible display through the speaker 233.

The additional function selector 250 of the present invention selectively selects three functions, a mute function for deleting an acoustic display, a dimmer function for adjusting the contrast of a visual display, and a function for reducing reception sensitivity as needed. The pulse was applied to the central processing unit 190 so as to satisfy the user's desire.

The laser module 260 is simple and low cost, and is characterized in that it is integrated with the structure of the horn antenna 111 so as not to affect the overall size of the product.

Looking at the operating state of the laser module 260, the laser signal is converted to the optical signal received through the light receiving element 261 to the current signal, the converted signal is linearly amplified by the linear amplifier (262, 263).

The amplified signal is amplified enough to drive the monostable multivibrator 265 of the final stage while the waveform is differentiated while passing through the logic amplifier 264 and saturated to a logic level.

Although the amplitude of the signal is sufficiently amplified through the multi-stage amplification unit, the central processing unit 190 does not recognize the amplitude such that the width of the pulse changes according to the intensity of the incident signal. 265) to generate a pulse having a uniform width and to apply it to the central processing unit 190, thereby controlling the period of the pulse to perform a similar operation to the radar reception to detect the laser signal.

As described above, the present invention can reduce the size and widen the product, reduce the production cost, prevent malfunction due to noise, and set the priority of the received signal, so that the user can clearly determine the situation. It is an invention that can be prevented, to detect a variety of control signals in the future related to the intelligent transport system (ITS: INTELLIGENT TRANSPORT SYSTEM), and furthermore can be applied to the vehicle collision prevention system.

Claims (9)

A first local oscillation unit integrally installed on one side of the horn antenna; A first amplifier for mixing and amplifying all signals received by the horn antenna and a first local frequency generated by the first local oscillator in a first mixer; A second local oscillator comprising three oscillators for oscillating independent frequencies; A second amplifier for amplifying the signal amplified by the first amplifier and a second local frequency generated by the second local oscillator after mixing in a second mixer; A filter unit for selecting and passing the signal amplified by the second amplifier; A demodulation unit for detecting a signal passing through the filter unit; An AD converter converting the detected signal into a digital signal; Measuring and calculating the period of the digital signal and the width of the signal to analyze and output the band and information of the signal, generating a pulse to determine the type and information of the signal over time by the first local oscillator and the second local A central processing unit for adjusting driving of the oscillation unit; A pulse delay unit for delaying or maintaining a pulse received from the central processing unit; A sweep voltage generator for generating a voltage from the pulse delay unit to drive the first local oscillator; A laser module integrated in the horn antenna and receiving a laser signal; Voice display means for finding a voice signal of a type of information using the output signal and outputting the voice signal to a speaker through a voice amplifier; Visual display means for visually expressing the output signal in letters, numbers, and graphics on an alphanumeric display; And an additional function selection unit for selecting a display state of the audio display means and the visual display means. The wideband radar detector according to claim 1, wherein the first local oscillator is mainly composed of a GUNN diode, a VARACTOR diode, and an oscillation frequency adjusting bolt. The wideband oscillator of claim 1, wherein the second local oscillator is capable of independently oscillating frequencies of 300 MHz, 1380 MHz, and 2085 MHz, and alternately oscillates continuously regardless of the presence or absence of a received signal. Radar detector. The wideband radar detector of claim 1, wherein the laser module comprises a light receiving element, a linear amplifier, a logic amplifier, and a monostable multivibrator. The central processing unit of claim 1, wherein the additional function selection unit comprises a mute function for deleting an audio display, a dimmer function for adjusting the contrast of a visual display, and a function for reducing reception sensitivity as needed. Broadband radar detector, characterized in that applied to operate. An initialization step of initializing a memory and an input / output terminal; A high logic switching step of making the terminal controlling the first local oscillator high logic to detect whether a signal is received; An additional function operation step of detecting a selection of the additional function and operating the selected additional function; A reception test step of checking whether the radar receives the signal and checking the signal continuity; A signal checking step of determining a band and strength of the signal; An alarm method determining step of determining an alarm and an indication of a signal; A second local oscillator operation step of sequentially oscillating three second local oscillators; A delay step of delaying a predetermined time to prevent a malfunction and to stabilize the first local oscillator; A low logic switching step of converting the control terminal of the first local oscillator into low logic; A scan step of examining and outputting a signal; And an output step of visually and audibly outputting a test result of the scanning step. 7. The method of claim 6, wherein the delay time of the delay step is 10 ms. The method of claim 6, wherein the scanning step comprises a signal determination step of determining the strength and frequency of a signal, a laser signal determination step of checking whether a laser signal is received, and an authenticity determination step of checking the authenticity of the signals. Control method of a wideband radar detector, characterized in that. 9. The method of claim 8, wherein the authenticity determining step compares the sweep time of the first local oscillator and the on-off time of the second local oscillator with the pulse period of the received signal.